Green Roof Soil Treatments and Plant Varieties Study

1. Green Roof Soils and Plants Soil Treatments: “Standard” Soil Treatment: 65% lightweight expanded shale, 15% biosolids compost, 10% Perlite and 10% fines (All percentages calculated by weight) “Biochar” Soil Treatment: Contains 7% biochar in the proportionally adjusted standard soil media No soil (Control) Plant Treatments • 1. “Conventional” Plant Treatment: • White Stonecrop • Chain Stonecrop • Sedum Weihenstephaner Gold • Russian Stonecrop • Chives • Fuldaglut • John Creech • Eastern Prickly Pear • 2. “Alternative” Plant Treatment: • New England Blazing-Star • Common Yarrow • Chive • Eastern Red Columbine • Pennsylvania Sedge • Poverty Oat Grass • Spotted Beebalm 3. No plants (Control)

2. Plant Treatments • 1. “Conventional” Plant Treatment: • White Stonecrop • Chain Stonecrop • Sedum Weihenstephaner Gold • Russian Stonecrop • Chives • Fuldaglut • John Creech • Eastern Prickly Pear • 2. “Alternative” Plant Treatment: • New England Blazing-Star • Common Yarrow • Chive • Eastern Red Columbine • Pennsylvania Sedge • Poverty Oat Grass • Spotted Beebalm 3.No plants (Control)

3. Soil Treatments A. B. C. No Soil (Control) *Percentage of soil by weight

4. Watershed 1 Control No Soil Treatment No Plant Treatment

5. Watershed 6 Control No Soil Treatment No Plant Treatment

6. Watershed 7 “Standard” Soil Treatment (A) “Standard” Plant Treatment (1)

7. Watershed 3 “Standard” Soil Treatment (A) “Standard” Plant Treatment (1)

8. Watershed 2 “Standard” Soil Treatment (A) “Alternative” Plant Treatment (2)

9. Watershed4 “Standard” Soil Treatment (A) “Alternative” Plant Treatment (2)

10. Watershed 5 “Biochar” Soil Treatment (B) “Standard” Plant Treatment (1)

11. Watershed 8 “Biochar” Soil Treatment (B) “Standard” Plant Treatment (1)